Getting the Source SDK Beta

To run this beta version you will need to add -beta sdk to your command line when you start Steam. This can be done by opening up the Windows shortcut you use to launch Steam and adding -beta sdk right after Steam.exe. Please report any bugs or issue you find in this article.

Important: You should also disable Steam from running automatically when Windows starts, to prevent it from running the non-beta SDK. To disable Steam from running automatically:

Open the Steam window.

Choose Settings from the File menu.

Click on the Interface tab.

Uncheck the Run Steam when Windows starts option.

Note: Be sure to run the game you wish to edit before running the SDK, to make sure you have the latest updates.